Radio Emission Signatures in the Crab Pulsar

By T. Hankins, J. Eilek. 2007

216 citations recorded by the source corpus.

Our high time resolution observations of individual pulses from the Crab pulsar show that both the time and frequency signatures of the interpulse are distinctly different from those of the main pulse. Main pulses can occasionally be resolved into short-lived, relatively narrowband nanoshots. We believe these nanoshots are produced by soliton collapse in strong plasma turbulence. Interpulses at centimeter wavelengths are very different. Their dynamic spectrum contains regular, microsecond-long emission bands. We have detected these bands, proportionately spaced in frequency, from 4.5 to 10.5 GHz. The bands cannot easily be explained by any current theory of pulsar radio emission; we speculate on possible new models.

Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/9d1ec9c11a1ce6517b686dd363ba797abbbc85ff

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In Astronomy and Astrophysics

In Atomic and Molecular Physics, and Optics

Citations in the corpus

Supergiant pulses from extragalactic neutron stars (2015, methodology): “From a phenomenological standpoint, the largest single giant pulse observed to date from the Crab pulsar (Hankins & Eilek 2007) could only be detected within the Local Group at a flux density & 1 Jy.”
A Nearby Repeating Fast Radio Burst in the Direction of M81 (2021, background): “Such structures are not known to be seen in pulsar or RRAT spectra, although some Crab SGPs have shown a similar complex structure (Hankins & Eilek 2007).”
THE REPEATING FAST RADIO BURST FRB 121102: MULTI-WAVELENGTH OBSERVATIONS AND ADDITIONAL BURSTS (2016, result): “At higher frequencies (5–10 GHz), banded frequency structure has been observed with similar bandwidths to those we observe in FRB 121102 (∼ 300− 600 MHz; Hankins & Eilek 2007).”
High-Altitude Emission from Pulsar Slot Gaps: The Crab Pulsar (2008, background): “These pulsars are also the ones that have giant radio pulses, a phenomenon that may be related to the nonstandard emission geometry (Hankins & Eilek 2007).”
Five new fast radio bursts from the HTRU high-latitude survey at Parkes: First evidence for two-component bursts (2015, background): “Giant pulses from the Crab pulsar have been seen to exceed 2 MJy for less than 4 ns (Hankins & Eilek 2007).”
Coherent emission mechanisms in astrophysical plasmas (2017, background): “– Observations of the Crab pulsar on nanosecond timescales (Hankins and Eilek, 2007; Eilek and Hankins, 2016) led to the identification of fine structures called nano-shots.”
A real-time fast radio burst: polarization detection and multiwavelength follow-up (2014, background): “Such a high brightness temperature is beyond the regime of pulses from typical pulsars but approaches what is seen in the brightest nanoshot pulses from the Crab pulsar (1041 K) (Hankins & Eilek 2007).”